Vegas Movie Studio is a cut-down version of the above - about 40GBP - not sure how much in Australia. It will do what you want though it behaves differently to most editors.
Also Google "free NLE" (as in non-linear editors).

you could also search google for open source video editing programs. You may find some good results. Open source is always better (IMO) it's free and is open to additions/modifications by anyone, so it usually will work just as good or even better than professional software (Gimp vs photoshop for example)